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(NOMOdBL) 2 Sheets-Sheet 1. F. W GORDON 82; V. 0. STROBEL.

BLAST FURNACE TOP. No. 412,175. Patented Oct. 1, 1889.

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BLAST FURNACE-TOP. 1 No. 412,175. Patented Oct. 1, 1889.

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UNITED STATES PATENT rricn.

FRED XV. GORDON AND VICTOR 'O. STROBEL, OF PHILADELPHIA, PENNSYL- VANIA,ASSIGNORS TO GORDON, STROBEL & LAUREAU, OF SAME PLACE.

BLAST-FURNACE TO P.

SPECIFICATION forming part of Letters Patent No. 412,175, dated October1, 1889.

Application filed August 1, 1887. Serial No. 245,801. (No model.)

To all whom it may concern.-

Be it known that we, FRED W. GORDON and VICTOR O. SraoBEL, ofPhiladelphia, Philadelphia count-y, Pennsylvania, have invented certainnew and useful Improvements in Blast-Furnace Tops, of which thefollowing is a specification.

This invention pertains to the top work of blast-furnaces, and hasreference particularly to the charging mechanism.

The improvements will be readily understood from the followingdescription, taken in connection with the accompanying drawings, inwhich- Figure 1 is a vertical diametrical section of the top portion ofthe stack of a blast-furnace, showing charging mechanism, illustratingour improvements; Fig. 2, a plan of the same,

and Fig. 3 a vertical diametrical section of the air-cylinder L of Fig.1.

In the drawings, A indicates the top portion of a blast-furnace providedwith the usual charging-platform; B, the hell; 0, the hopper; 1), twopairs of columns arranged upon diametricallyopposite sides of the throatof the furnace; E, a pair of beams reaching across over the throat ofthe furnace and supported by said columns; F, the bell-rod, reachingupward from the hell between the beams E, the rod in the illustrationbeing really double, being formed of two flat bars set near eachother,side by side; G, the usual motor-cylinder, by which the bell israised and lowered; H, the motor-beam, connected at one end to thepiston-rod of the motor-cylinder and at the other end to the bell-rod,the beam centers being supported by plumber-blocks attached to the beamsE, the mot0r-beam working centrally between the beams E J, thecount-erbalanceweight blocks; K, the balance-beam, connected at one endto the bell-rod and at the other end to the balance-weight block andsupported by the beams E in a manner generally similar to the motor-beamL, an air-cylinder vertically disposed between two of the columns Dunder the balance-beam, this cylinder being supported upon thepivot-stud at its lower end, the pivot-stud being supported by thecolumns, so that the cylinder is capable of oscillating upon the stud,the piston-rod of this cylinder being connected to the balancebeam; M,aside pipe at the aincylinder, placing the two ends of the cylinder incommunication, the points where this pipe communicates with the ends ofthe cylinder being not directly at the ends of the cylinder, but at somedistance therefrom, so that the pis ton in its stroke may overrun theseconnections; N, a cock in this side pipe, serving as a means by whichits conduit-area maybe adjusted, and O petcocks at the extreme ends ofthe air-cylinder.

The bell is raised and lowered, as usual, by means of the motor-cylinderG, if employed, or by such other motor mechanism as may be preferred,and the hell is counterbalancedby means of the counterbalance J and beamK. As the bell is raised and lowered, the piston of the air-cylinderwill obviously travel from one end of the cylinder to the other. Indoing this the piston transfers the air in the cylinder from one end ofthe cylinder to the other, and the cock N maybe so regulated as toproduce more or less resistance to this transfer, and thereby serve inregulating the speed of the piston of the air-cylinder, and consequentlythe speed of the bell movement, without imposing a solid, regulativeresistance to the bell movement, the elasticity of the resisting mediumavoiding this. The cocks 0 may be entirely or partially open, andconsequently when the piston moves from one end to the other of theair-cylinder part 01": the air will be transferred through the side pipeM and part of the air of the compression will be blown out through oneof the pet-cocks, while air flows in at the other petcock. Thecommunications of the side pipe with the air-cylinder being somedistance from the end of the cylinder, it follows that the piston whennearing the ends of its strokes will overrun these communications andprevent further outflow of air through the side pipe. The balance of thestroke of the piston Will be completed against the resistance ofconfined air, except as the air may escape through the petcoclr. Thepiston becomes, therefore, cushioned at each end of its stroke. WVhenthe piston starts to return at the end of its stroke, air may flow inthrough the appropriate petcock, and thus destroy the vacuum. Thepetcocks are not essential,however, since no Vacuum will be formed ifthe piston leaks a little, which is liable to be the case, and this sameleakage will e'nable the confined air to restrict the motion of thepiston by flow after the side pipe communications have been overrun tothe atmosphere, while new air from the atmosphere flows into the otherend of the cylinder. The air-cylinder thus serves, primarily, incontrolling the speed of bell movement through the resistance of anelastic medium. The cushioning of the piston near the ends of its strokeserves in checking the movement of the bell and preventing shocks at theend of the bell travel when the bell is arrested at either end of itstravel, and also when the bell is started in either direction.

- WVe show apeculiar mechanism connecting the bell-rod with the twobeams; but we disclaim this feature as being of our invention.

. We claim as our invention 1. In a blast-furnace, the combination, witha bell and hopper and actuating-beams, and motor mechanism for raisingand lowering the bell, of a resisting air-cylinder provided 'with apiston having its piston-rod connected to one of said beams, a conduitconnecting with the two ends of the cylinder and adapted to have itsconnections with the cylinder overrun by said piston, a cock in saidconduit serving as a means for adjusting the effective conduit area, andcocks at the extreme ends of the cylinder, substantially as and for thepurpose set forth.

2. In blast-furnaces, the combination, substantially as set forth, ofthe columns -D, 10-

cated in pairs at diametrically-opposite sides of the furnace-throat,beams E, supported by said columns, bell and hopper B O, bell-rod F,reaching from the bell upward between said beams, oscillating beams Hand K, connected to said bell-rod and disposed between saidfirst-mentioned beams and having their centers supported thereby, andmotor mechanism and a counter-balance connected, respectively, with saidoscillating beams.

3. In blast furnaces, the combination, with a bell and hopper, abell-rod, an oscillating beam connected with the bell-rod, and motormechanism for raising and lowering the bell through-the instrumentalityof said beam, of a second oscillating beam connected to the bell-rod, acounter-balance attached thereto, and regulating-cylinder L, con nectedwith said last-mentioned beam.

4. In blast-furnaces, the combination of a bell and hopper, a bell-rod,and mechanism for raising and lowering the bell, of two pairs of columnsD, beam K, supported thereby and connected to the bell-rod,counter-balance J, attached to said beam, and air-cylinder L, disposedbetween the two columns of one of said pairs of columns and connectedwith said beam.

FRED WV. GORDON. VICTOR O. STROBEL.

Witnesses:

JNO. TAYLOR, LOUIS M. WAGNER.

